A synthetically modified hydrophobin showing enhanced fluorous affinity

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:448

Article

Milani, Roberto^1,2  Pirrie, Lisa^1,3  Gazzera, Lara³  Paananen, Arja¹  Baldrighi, Michele³  Monogioudi, Evanthia¹  Cavallo, Gabriella³  Linder, Markus^1,4  Resnati, Giuseppe^2,3  Metrangolo, Pierangelo^1,2,3 

[1] VTT Tech Res Ctr Finland Ltd, FI-02044 Espoo, Vtt, Finland

[2] Ist Italiano Tecnol, Ctr Nanosci & Technol Polimi, I-20133 Milan, Italy

[3] Politecn Milan, NFMLab DCMIC Giulio Natta, I-20131 Milan, Italy

[4] Aalto Univ, Sch Chem Technol, FI-00076 Aalto Espoo, Finland

关键词: Hydrophobin;    Surfactant protein;    Protein film formation;    Fluorinated material;    Fluorous tag;    Compatibilization;   

DOI  :  10.1016/j.jcis.2015.02.003

来源: Elsevier

【 摘 要 】

Hydrophobins are natural surfactant proteins endowed with exceptional surface activity and filmforming capabilities and their use as effective fluorine-free fluorosurfactants has been recently reported. In order to increase their fluorophilicity further, here we report the preparation of a unique fluorous-modified hydrophobin, named F-HFBI. F-HFBI was found to be more effective than its wild-type parent protein HFBI at reducing interface tension of water at both air/water and oil/water interfaces, being particularly effective at the fluorous/water interface. F-HFBI was also found to largely retain the exceptionally good capability of forming strong and elastic films, typical of the hydrophobin family. Further studies by interface shear rheology and isothermal compression, alongside Quartz Crystal Microbalance and Atomic Force Microscopy, demonstrated the tendency of F-HFBI to form thicker films compared to the wild-type protein. These results suggest that F-HFBI may function as an effective compatibilizer for biphasic systems comprising a fluorous phase. (C) 2015 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licensesThy-nc-nd/4.0/).

【 授权许可】

Free